21223210520203 has 2 divisors, whose sum is σ = 21223210520204. Its totient is φ = 21223210520202.

The previous prime is 21223210520189. The next prime is 21223210520287. The reversal of 21223210520203 is 30202501232212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21223210520203 - 2¹³ = 21223210512011 is a prime.

It is a super-2 number, since 2×21223210520203² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21223210520903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611605260101 + 10611605260102.

It is an arithmetic number, because the mean of its divisors is an integer number (10611605260102).

Almost surely, 2^{21223210520203} is an apocalyptic number.

21223210520203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223210520203 is an equidigital number, since it uses as much as digits as its factorization.

21223210520203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 21223210520203 its reverse (30202501232212), we get a palindrome (51425711752415).

The spelling of 21223210520203 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred ten million, five hundred twenty thousand, two hundred three".